SOLUTION: Use Multiplication Principle to calculate in how many ways you can select a 3-digit number code for your locker. All single digits(numbers) should be different. Like 235 or 870

Question 873391: Use Multiplication Principle
to calculate in how many ways you can select a 3-digit number code for your locker.
All single digits(numbers) should be different.
Like 235 or 870 or 061 and so on.
Tip: To find total number of choices multiply number of choices for the first digit
times number of choices for the second digit times number of choices for the third digit.
Remember: you cannot use the same digit again.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
You have 10 choices for slot 1, 10-1 = 9 choices for slot 2, and 10-2 = 8 choices for slot 3.

Multiply them: 10*9*8 = 90*8 = 720

There are 720 different 3 digit codes. This is with no repeats in digits.
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